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Rathi S, Griffith JI, Zhang W, Zhang W, Oh JH, Talele S, Sarkaria JN, Elmquist WF. The influence of the blood-brain barrier in the treatment of brain tumours. J Intern Med 2022; 292:3-30. [PMID: 35040235 DOI: 10.1111/joim.13440] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Brain tumours have a poor prognosis and lack effective treatments. The blood-brain barrier (BBB) represents a major hurdle to drug delivery to brain tumours. In some locations in the tumour, the BBB may be disrupted to form the blood-brain tumour barrier (BBTB). This leaky BBTB enables diagnosis of brain tumours by contrast enhanced magnetic resonance imaging; however, this disruption is heterogeneous throughout the tumour. Thus, relying on the disrupted BBTB for achieving effective drug concentrations in brain tumours has met with little clinical success. Because of this, it would be beneficial to design drugs and drug delivery strategies to overcome the 'normal' BBB to effectively treat the brain tumours. In this review, we discuss the role of BBB/BBTB in brain tumour diagnosis and treatment highlighting the heterogeneity of the BBTB. We also discuss various strategies to improve drug delivery across the BBB/BBTB to treat both primary and metastatic brain tumours. Recognizing that the BBB represents a critical determinant of drug efficacy in central nervous system tumours will allow a more rapid translation from basic science to clinical application. A more complete understanding of the factors, such as BBB-limited drug delivery, that have hindered progress in treating both primary and metastatic brain tumours, is necessary to develop more effective therapies.
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Affiliation(s)
- Sneha Rathi
- Department of Pharmaceutics, University of Minnesota, Minneapolis, MN, USA
| | - Jessica I Griffith
- Department of Pharmaceutics, University of Minnesota, Minneapolis, MN, USA
| | - Wenjuan Zhang
- Department of Pharmaceutics, University of Minnesota, Minneapolis, MN, USA
| | - Wenqiu Zhang
- Department of Pharmaceutics, University of Minnesota, Minneapolis, MN, USA
| | - Ju-Hee Oh
- Department of Pharmaceutics, University of Minnesota, Minneapolis, MN, USA
| | - Surabhi Talele
- Department of Pharmaceutics, University of Minnesota, Minneapolis, MN, USA
| | - Jann N Sarkaria
- Department of Radiation Oncology, Mayo Clinic, Rochester, MN, USA
| | - William F Elmquist
- Department of Pharmaceutics, University of Minnesota, Minneapolis, MN, USA
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Finite Element Model to Reproduce the Effect of Pre-Stress and Needle Insertion Velocity During Infusions into Brain Phantom Gel. Ing Rech Biomed 2021. [DOI: 10.1016/j.irbm.2020.04.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Liu M, Dasgupta A, Koczera P, Schipper S, Rommel D, Shi Y, Kiessling F, Lammers T. Drug Loading in Poly(butyl cyanoacrylate)-Based Polymeric Microbubbles. Mol Pharm 2020; 17:2840-2848. [PMID: 32589435 DOI: 10.1021/acs.molpharmaceut.0c00242] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Microbubbles (MB) are routinely used ultrasound (US) contrast agents that have recently attracted increasing attention as stimuli-responsive drug delivery systems. To better understand MB-based drug delivery, we studied the role of drug hydrophobicity and molecular weight on MB loading, shelf-life stability, US properties, and drug release. Eight model drugs, varying in hydrophobicity and molecular weight, were loaded into the shell of poly(butyl cyanoacrylate) (PBCA) MB. In the case of drugs with progesterone as a common structural backbone (i.e., for corticosteroids), loading capacity and drug release correlated well with hydrophobicity and molecular weight. Conversely, when employing drugs with no structural similarity (i.e., four different fluorescent dyes), loading capacity and release did not correlate with hydrophobicity and molecular weight. All model drug-loaded MB formulations could be equally efficiently destroyed upon exposure to US. Together, these findings provide valuable insights on how the physicochemical properties of (model) drug molecules affect their loading and retention in and US-induced release from polymeric MB, thereby facilitating the development of drug-loaded MB formulations for US-triggered drug delivery.
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Affiliation(s)
- Mengjiao Liu
- Institute for Experimental Molecular Imaging, RWTH Aachen University Clinic, Aachen 52074, Germany
| | - Anshuman Dasgupta
- Institute for Experimental Molecular Imaging, RWTH Aachen University Clinic, Aachen 52074, Germany
| | - Patrick Koczera
- Institute for Experimental Molecular Imaging, RWTH Aachen University Clinic, Aachen 52074, Germany.,Department of Intensive Care Medicine, Medical Faculty, RWTH Aachen University Clinic, Aachen 52074, Germany
| | - Sandra Schipper
- Institute for Experimental Molecular Imaging, RWTH Aachen University Clinic, Aachen 52074, Germany
| | - Dirk Rommel
- DWI-Leibniz Institute for Interactive Materials, RWTH Aachen University, Aachen 52074, Germany
| | - Yang Shi
- Institute for Experimental Molecular Imaging, RWTH Aachen University Clinic, Aachen 52074, Germany
| | - Fabian Kiessling
- Institute for Experimental Molecular Imaging, RWTH Aachen University Clinic, Aachen 52074, Germany
| | - Twan Lammers
- Institute for Experimental Molecular Imaging, RWTH Aachen University Clinic, Aachen 52074, Germany
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Orozco GA, Smith JH, García JJ. Three-dimensional nonlinear finite element model to estimate backflow during flow-controlled infusions into the brain. Proc Inst Mech Eng H 2020; 234:1018-1028. [DOI: 10.1177/0954411920937220] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Convection-enhanced delivery is a technique to bypass the blood–brain barrier and deliver therapeutic drugs into the brain tissue. However, animal investigations and preliminary clinical trials have reported reduced efficacy to transport the infused drug in specific zones, attributed mainly to backflow, in which an annular gap is formed outside the catheter and the fluid preferentially flows toward the surface of the brain rather than through the tissue in front of the cannula tip. In this study, a three-dimensional human brain finite element model of backflow was developed to study the influence of anatomical structures during flow-controlled infusions. Predictions of backflow length were compared under the influence of ventricular pressure and the distance between the cannula and the ventricles. Simulations with zero relative ventricle pressure displayed similar backflow length predictions for larger cannula-ventricle distances. In addition, infusions near the ventricles revealed smaller backflow length and the liquid was observed to escape to the longitudinal fissure and ventricular cavities. Simulations with larger cannula-ventricle distances and nonzero relative ventricular pressure showed an increase of fluid flow through the tissue and away from the ventricles. These results reveal the importance of considering both the subject-specific anatomical details and the nonlinear effects in models focused on analyzing current and potential treatment options associated with convection-enhanced delivery optimization for future clinical trials.
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Affiliation(s)
- Gustavo A Orozco
- Department of Applied Physics, University of Eastern Finland, Kuopio, Finland
| | - Joshua H Smith
- Department of Mechanical Engineering, Lafayette College, Easton, PA, USA
| | - José J García
- Escuela de Ingeniería Civil y Geomática, Universidad del Valle, Cali, Colombia
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5
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Nittayacharn P, Abenojar E, De Leon A, Wegierak D, Exner AA. Increasing Doxorubicin Loading in Lipid-Shelled Perfluoropropane Nanobubbles via a Simple Deprotonation Strategy. Front Pharmacol 2020; 11:644. [PMID: 32477125 PMCID: PMC7235281 DOI: 10.3389/fphar.2020.00644] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 04/22/2020] [Indexed: 01/29/2023] Open
Abstract
Drug delivery to solid tumors using echogenic nanobubbles (NBs) and ultrasound (US) has recently gained significant interest. The approach combines attributes of nanomedicine and the enhanced permeation and retention (EPR) effect with the documented benefits of ultrasound to improve tumor drug distribution and treatment outcomes. However, optimized drug loading strategies, the drug-carrying capacity of NBs and their drug delivery efficiency have not been explored in depth and remain unclear. Here, we report for the first time on the development of a novel deprotonated hydrophobic doxorubicin-loaded C3F8 nanobubble (hDox-NB) for more effective US-mediated drug delivery. In this study, the size distribution and yield of hDox-NBs were measured via resonant mass measurement, while their drug-loading capacity was determined using a centrifugal filter technique. In vitro acoustic properties including contrast-imaging enhancement, initial echogenic signal, and decay were assessed and compared to doxorubicin hydrochloride loaded-NBs (Dox.HCl-NBs). In addition, in vitro therapeutic efficacy of hDox-NBs was evaluated by cytotoxicity assay in human ovarian cancer cells (OVCAR-3). The results showed that the hDox-NBs were small (300.7 ± 4.6 nm), and the drug loading content was significantly enhanced (2 fold higher) compared to Dox.HCl-NBs. Unexpectedly, the in vitro acoustic performance was also improved by inclusion of hDox into NBs. hDox-NB showed higher initial US signal and a reduced signal decay rate compared to Dox.HCl-NBs. Furthermore, hDox-NBs combined with higher intensity US exhibited an excellent therapeutic efficacy in human ovarian cancer cells as shown in a reduction in cell viability. These results suggest that hDox-NBs could be considered as a promising theranostic agent to achieve a more effective noninvasive US-mediated drug delivery for cancer treatment.
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Affiliation(s)
- Pinunta Nittayacharn
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, United States
| | - Eric Abenojar
- Department of Radiology, Case Western Reserve University, Cleveland, OH, United States
| | - Al De Leon
- Department of Radiology, Case Western Reserve University, Cleveland, OH, United States
| | - Dana Wegierak
- Department of Physics, Ryerson University, Toronto, ON, Canada
| | - Agata A Exner
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, United States.,Department of Radiology, Case Western Reserve University, Cleveland, OH, United States
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宋 宇, 韩 鸿, 杨 军, 王 艾, 和 清, 李 媛, 赵 国, 高 亚, 王 睿, 韩 易, 刘 爱, 宋 清. [Effect of convection enhanced delivery on the microstructure of brain extracellular space in aged rats]. BEIJING DA XUE XUE BAO. YI XUE BAN = JOURNAL OF PEKING UNIVERSITY. HEALTH SCIENCES 2020; 52:362-367. [PMID: 32306023 PMCID: PMC7433439 DOI: 10.19723/j.issn.1671-167x.2020.02.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Indexed: 06/11/2023]
Abstract
OBJECTIVE To compare the changes of extracellular space (ECS) structure and local drug distribution in adult brain and aged brain at different drug delivery rates in minimally invasive treatment of encephalopathy by convection enhanced delivery (CED) via ECS pathway. METHODS Thirty-six SD male rats were divided into adult rats group (2-8 months, n=18) and aged rats group (18-24 months, n=18) according to the age of the month. According to the drug rates (0.1 μL/min, 0.2 μL/min, and 0.3 μL/min), they were randomly divided into 3 subgroups, 6 in each subgroup. Gadolinium-diethylene triamine pentaacetic acid (Gd-DTPA) with a concentration of 10 mmol/L were introduced into the caudate nucleus of each group of rats by stereotactic injection. Tracer-based magnetic resonance imaging (MRI) was used to dynamically monitor the diffusion and distribution images of the Gd-DTPA in the brain interstitial system (ISS). Using the self-developed MRI image measurement and analysis system software to process and analyze the obtained images, the diffusion coefficient, clearance rate, volume fraction, and half-life of each group of rats in the caudate nucleus ECS could be acquired. The effects and differences of drug clearance and ECS structural function in the brain of aged rats and adult rats were compared and analyzed at different drug delivery rates. Magnetic tracer DECS-mapping technique was used to observe the distribution and drainage of tracer in caudate nucleus. RESULTS At the injection rate of 0.1 μL/min, the volume fraction in the aged rats was increased compared with that in the adult rats (18.20%±0.04% vs. 17.20%±0.03%, t=3.752, P=0.004), and the degree of tortuosity was decreased (1.63±0.04 vs. 1.78±0.09, t=-3.680, P=0.004), the drug clearance rate was decreased [(1.94±0.68) mm2/s vs. (3.25±0.43) mm2/s, t=-3.971, P=0.003], and the molecular diffusion in ECS was increased [(3.99±0.21)×10-4 mm2/s vs. (3.36±0.37)×10-4 mm2/s, t=3.663, P=0.004]. When the rate of injection increased to 0.2 μL/min, the drug clearance in ECS of the aged rats was slowed down [(2.53±0.45) mmol/L vs. (3.37±0.72) mmol/L, t=-1.828, P=0.021]. However, there were no significant differences in volume fraction, molecular diffusion in ECS and macroscopic drug metabolism parameters. When the rate of injection increased to 0.3 μL/min, the volume fraction in the aged rats was decreased (17.20%±0.03% vs. 18.20%±0.05%, t=-0.869, P=0.045), and the drug clearance rate in ECS was significantly accelerated [(4.04±0.76) mmol/L vs. (3.26±0.55) mmol/L, t=1.786, P=0.014], and there was no significant difference in tortuosity and the rate of molecular diffusion in the ECS. CONCLUSION The drug clearance and ECS structural parameters of brain ECS in aged brain with CED administration were changed at different rates, and it has the least effect on ECS in the aged brain at the injection rate of 0.2 μL/min. For the application of CED for the treatment of encephalopathy, we should consider the influence of factors such as age and injection rate, and provide reference for the development of individualized clinical treatment plan for minimally invasive treatment of encephalopathy via ECS pathway.
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Affiliation(s)
- 宇 宋
- 大连医科大学附属第一医院放射科, 辽宁大连 116011Department of Radiology, the First Affiliated Hospital of Dalian Medical University, Dalian 116011, Liaoning, China
- 北京大学医学部医学技术研究院, 北京 100191Institute of Medical Technology, Peking University Health Science Center, Beijing 100191, China
| | - 鸿宾 韩
- 北京大学医学部医学技术研究院, 北京 100191Institute of Medical Technology, Peking University Health Science Center, Beijing 100191, China
- 北京市磁共振成像设备与技术重点实验室, 北京 100191Beijing Key Lab of Magnetic Resonance Imaging Device and Technique, Beijing 100191, China
- 北京大学第三医院放射科, 北京 100191Department of Radiology, Peking University Third Hospital, Beijing 100191, China
| | - 军 杨
- 北京大学第三医院神经外科, 北京 100191Department of Neurosurgery, Peking University Third Hospital, Beijing 100191, China
| | - 艾博 王
- 北京市磁共振成像设备与技术重点实验室, 北京 100191Beijing Key Lab of Magnetic Resonance Imaging Device and Technique, Beijing 100191, China
- 北京大学第三医院放射科, 北京 100191Department of Radiology, Peking University Third Hospital, Beijing 100191, China
| | - 清源 和
- 北京市磁共振成像设备与技术重点实验室, 北京 100191Beijing Key Lab of Magnetic Resonance Imaging Device and Technique, Beijing 100191, China
- 北京大学第三医院放射科, 北京 100191Department of Radiology, Peking University Third Hospital, Beijing 100191, China
| | - 媛媛 李
- 北京市磁共振成像设备与技术重点实验室, 北京 100191Beijing Key Lab of Magnetic Resonance Imaging Device and Technique, Beijing 100191, China
- 北京大学第三医院放射科, 北京 100191Department of Radiology, Peking University Third Hospital, Beijing 100191, China
| | - 国梅 赵
- 北京市磁共振成像设备与技术重点实验室, 北京 100191Beijing Key Lab of Magnetic Resonance Imaging Device and Technique, Beijing 100191, China
- 北京大学第三医院放射科, 北京 100191Department of Radiology, Peking University Third Hospital, Beijing 100191, China
| | - 亚娟 高
- 北京市磁共振成像设备与技术重点实验室, 北京 100191Beijing Key Lab of Magnetic Resonance Imaging Device and Technique, Beijing 100191, China
- 北京大学第三医院放射科, 北京 100191Department of Radiology, Peking University Third Hospital, Beijing 100191, China
| | - 睿 王
- 北京市磁共振成像设备与技术重点实验室, 北京 100191Beijing Key Lab of Magnetic Resonance Imaging Device and Technique, Beijing 100191, China
- 北京大学第三医院放射科, 北京 100191Department of Radiology, Peking University Third Hospital, Beijing 100191, China
| | - 易兴 韩
- 北京市磁共振成像设备与技术重点实验室, 北京 100191Beijing Key Lab of Magnetic Resonance Imaging Device and Technique, Beijing 100191, China
- 北京大学第三医院放射科, 北京 100191Department of Radiology, Peking University Third Hospital, Beijing 100191, China
| | - 爱连 刘
- 大连医科大学附属第一医院放射科, 辽宁大连 116011Department of Radiology, the First Affiliated Hospital of Dalian Medical University, Dalian 116011, Liaoning, China
| | - 清伟 宋
- 大连医科大学附属第一医院放射科, 辽宁大连 116011Department of Radiology, the First Affiliated Hospital of Dalian Medical University, Dalian 116011, Liaoning, China
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Abstract
Ultrasound and magneto-responsive nanosized drug delivery systems have been designed as novel carriers for controlled release. Colloidal bubbles (CBs) could be designed to incorporate different materials, such as protein, lipid, polymer, surfactants, and even nanoparticles in their shell, which makes them suitable for a wide range of drug delivery applications. The interior of CBs may be filled with different gases, which is essential for conferring the characteristics of an ultrasounds contrasting agent. Manipulating the core of CBs enhances features such as stability and duration of the echogenic effect. Thus CBs derivatized with nanoparticles combine functional properties of CBs and NPs to yield a versatile theranostics platform technology.
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Drug-Loaded Microbubbles Combined with Ultrasound for Thrombolysis and Malignant Tumor Therapy. BIOMED RESEARCH INTERNATIONAL 2019; 2019:6792465. [PMID: 31662987 PMCID: PMC6791276 DOI: 10.1155/2019/6792465] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 07/22/2019] [Accepted: 09/14/2019] [Indexed: 12/14/2022]
Abstract
Cardiac-cerebral thrombosis and malignant tumor endanger the safety of human life seriously. Traditional chemotherapy drugs have side effects which restrict their applications. Drug-loaded microbubbles can be destroyed by ultrasound irradiation at the focus position and be used for thrombolysis and tumor therapy. Compared with traditional drug treatment, the drug-loaded microbubbles can be excited by ultrasound and release drugs to lesion sites, increasing the local drug concentration and the exposure dose to nonfocal regions, thus reducing the cytotoxicity and side effects of drugs. This article reviews the applications of drug-loaded microbubbles combined with ultrasound for thrombolysis and tumor therapy. We focus on highlighting the advantages of using this new technique for disease treatment and concluding with recommendations for future efforts on the applications of this technology.
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Pang HH, Chen PY, Wei KC, Huang CW, Shiue YL, Huang CY, Yang HW. Convection-Enhanced Delivery of a Virus-Like Nanotherapeutic Agent with Dual-Modal Imaging for Besiegement and Eradication of Brain Tumors. Theranostics 2019; 9:1752-1763. [PMID: 31037136 PMCID: PMC6485197 DOI: 10.7150/thno.30977] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 01/06/2019] [Indexed: 12/21/2022] Open
Abstract
Convection-enhanced delivery (CED) is a promising technique for infusing a therapeutic agent directly into the brain, bypassing the blood-brain barrier (BBB) with a pressure gradient to increase drug concentration specifically around the brain tumor, thereby enhancing tumor inhibition and limiting the systemic toxicity of chemotherapeutic agents. Herein, we developed a dual-imaging monitored virus-like nanotherapeutic agent as an ideal CED infusate, which can be delivered to specifically besiege and eradicate brain tumors. Methods: We report one-pot fabrication of green-fluorescence virus-like particles (gVLPs) in Escherichia coli (E. coli) for epirubicin (EPI) loading, cell-penetrating peptide (CPP) modification, and 68Ga-DOTA labeling to form a positron emission tomography (PET)-fluorescence dual-imaging monitored virus-like nanotherapeutic agent (68Ga-DOTA labeled EPI@CPP-gVLPs) combined with CED for brain tumor therapy and image tracking. The drug delivery, cytotoxicity, cell uptake, biodistribution, PET-fluorescence imaging and anti-tumor efficacy of the 68Ga-DOTA labeled EPI@CPP-gVLPs were investigated in vitro and in vivo by using U87-MG glioma cell line and U87-MG tumor model. Results: The 68Ga-DOTA-labeled EPI@CPP-gVLPs showed excellent serum stability as an ideal CED infusate (30-40 nm in size), and can be disassembled through proteolytic degradation of the coat protein shell to enable drug release and clearance to minimize long-term accumulation. The present results indicated that 68Ga-DOTA-labeled EPI@CPP-gVLPs can provide a sufficiently high drug payload (39.2 wt% for EPI) and excellent detectability through fluorescence and PET imaging to accurately represent drug distribution during CED infusion. In vivo delivery of the 68Ga-DOTA-labeled EPI@CPP-gVLPs through CED demonstrated that the median survival was prolonged to over 50 days when the mice received two administrations (once per week) compared with the control group (median survival: 26 days). Conclusion: The results clearly indicated that a combination of 68Ga-DOTA-labeled EPI@CPP-gVLPs and CED can serve as a flexible and powerful synergistic treatment in brain tumors without evidence of systemic toxicity.
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Affiliation(s)
- Hao-Han Pang
- Institute of Medical Science and Technology, National Sun Yat-sen University, 70 Lienhai Rd., Kaohsiung 80424, Taiwan
- Institute of Biomedical Sciences, National Sun Yat-sen University, 70 Lienhai Rd., Kaohsiung 80424, Taiwan
| | - Pin-Yuan Chen
- Department of Neurosurgery, Chang Gung Memorial Hospital, Keelung, 222 Maijin Rd., Keelung 20401, Taiwan
- Community Medicine Research Center and Laboratory Animal Center, Chang Gung Memorial Hospital, Keelung, 222 Maijin Rd., Keelung 20401, Taiwan
- School of Medicine, Chang Gung University, 259 Wenhua 1st Rd., Guishan Dist., Taoyuan 33302, Taiwan
| | - Kuo-Chen Wei
- School of Medicine, Chang Gung University, 259 Wenhua 1st Rd., Guishan Dist., Taoyuan 33302, Taiwan
- Department of Neurosurgery, Chang Gung Memorial Hospital, Linkou, 5 Fuxing St., Guishan Dist., Taoyuan 33305, Taiwan
| | - Chiun-Wei Huang
- Center for Advanced Molecular Imaging and Translation, Chang Gung Memorial Hospital, Linkou, 5 Fuxing St., Guishan Dist., Taoyuan 33305, Taiwan
| | - Yow-Ling Shiue
- Institute of Biomedical Sciences, National Sun Yat-sen University, 70 Lienhai Rd., Kaohsiung 80424, Taiwan
| | - Chiung-Yin Huang
- School of Medicine, Chang Gung University, 259 Wenhua 1st Rd., Guishan Dist., Taoyuan 33302, Taiwan
- Department of Neurosurgery, Chang Gung Memorial Hospital, Linkou, 5 Fuxing St., Guishan Dist., Taoyuan 33305, Taiwan
| | - Hung-Wei Yang
- Institute of Medical Science and Technology, National Sun Yat-sen University, 70 Lienhai Rd., Kaohsiung 80424, Taiwan
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Zhao B, Chen Y, Liu J, Zhang L, Wang J, Yang Y, Lv Q, Xie M. Blood-brain barrier disruption induced by diagnostic ultrasound combined with microbubbles in mice. Oncotarget 2017; 9:4897-4914. [PMID: 29435150 PMCID: PMC5797021 DOI: 10.18632/oncotarget.23527] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 12/04/2017] [Indexed: 12/31/2022] Open
Abstract
Objective To investigate the effects of the microbubble (MB) dose, mechanism index (MI) and sonication duration on blood-brain barrier (BBB) disruption induced by diagnostic ultrasound combined with MBs as well as to investigate the potential molecular mechanism. Results The extent of BBB disruption increased with MB dose, MI and sonication duration. A relatively larger extent of BBB disruption associated with minimal tissue damage was achieved by an appropriate MB dose and ultrasound exposure parameters with diagnostic ultrasound. Decreased expression of ZO-1, occludin and claudin-5 were correlated with disruption of the BBB, as confirmed by paracellular passage of the tracer lanthanum nitrate into the brain parenchyma after BBB disruption. Conclusions These findings indicated that this technique is a promising tool for promoting brain delivery of diagnostic and therapeutic agents in the diagnosis and treatment of brain diseases. Methods The extent of BBB disruption was qualitatively assessed by Evans blue (EB) staining and quantitatively analyzed by an EB extravasation measurement. A histological examination was performed to evaluate tissue damage. Expression of tight junction (TJ) related proteins ZO-1, occludin and claudin-5 was determined by western blotting analysis and immunohistofluorescence. Transmission electron microscopy was performed to observe ultrastructure changes of TJs after BBB disruption.
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Affiliation(s)
- Bingxia Zhao
- Department of Ultrasound, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.,Hubei Key Laboratory of Molecular Imaging, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Yihan Chen
- Department of Ultrasound, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.,Hubei Key Laboratory of Molecular Imaging, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Jinfeng Liu
- Department of Ultrasound, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.,Hubei Key Laboratory of Molecular Imaging, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Li Zhang
- Department of Ultrasound, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.,Hubei Key Laboratory of Molecular Imaging, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Jing Wang
- Department of Ultrasound, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.,Hubei Key Laboratory of Molecular Imaging, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Yali Yang
- Department of Ultrasound, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.,Hubei Key Laboratory of Molecular Imaging, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Qing Lv
- Department of Ultrasound, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.,Hubei Key Laboratory of Molecular Imaging, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Mingxing Xie
- Department of Ultrasound, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.,Hubei Key Laboratory of Molecular Imaging, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
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